Car-window



W. H. DAWSON.

GAR WINDOW.

No. 387,403. Patented Aug. 7, 1888.

FZ5-4.- mi? if f-W'NSB y il'NtTnn STATES ePATENT FF 15C-.

CAR-WINDOW.

SPECIFICATION forming part of Letters Patent No. 387,403, dated August 7. 1889- Application filed April 26, 1888.

To all whom it may concern.:

Be it known that I, WILLIAM H. DAwsoN, of Lawrence, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Car-Windows, of which the following is a specification.

This invention has for its object to prevent the admission of dust, cinders, Src., around the sashes of car-windows; and it consists in a sash having a flexible strip, preferably of rubber, inserted in its edges, combined with a casing having grooves formed to receive said strip, the form and depth of each groove being such as that the outer edge of the sashstrip therein will closely fit the bottom of the groove, the depth of which is slightly less than the width of the strip, so that the latter has to be bent slightly, and is thus caused to bear firmly against the bottom of the groove, while the width of the groove is such as to permit the described bending of the strip, as I will now proceed to describe.

Ofthe accompanying drawings, forming a part of this specification, Figure l represents.

a perspective view of the sash and a portion of the casing of a car-Window having my iinprovement. Fig. 2 represents a vertical sec tion of the same. Fig. 3 represents a horizontal section. Fig. -it represents an enlarged sectional view of a portion of the sash and casing. Fig. 5 represents a similar view ofa modification. Fig. 6 represents a section of a portion of the window ledge or sill and the lower portion of the sash.

The same letters of reference indicate the same parts in all the figures.

In the drawings, a represents the casing of a car-window, and b the sash thereof.

In carrying out myinvention I insert in the edges of the sash flexible strips c c, which are preferably of sheet rubber, said strips projecting outwardly from each vertical edge of the sash. A similar strip, c', is preferably inserted in the bottom of the sash, as shown in Figs. 2 and 6.

rlhe casing is provided with groovesff, formed to receive said strips. The depth of each groove is slightly less than the width of the strip which enters it, and the bottom of each groove is made narrow to form a seat, 2, against which the outer edge ofthe strip c Serial No. 271,919. (No model.)

bears, said edge being held against the bottomof the groove with a yielding pressure which is caused by the transverse bending of the strip, which bending is .made necessary by the excess in the width of the projecting part of the strip over the depth ofthe groove f. Each groove f is tapered or made wider from its bottoni outwardly, as shown in Figs. 3, 4, and 5, to permit the described bending of the strip. It will be seen, therefore, that when the sash is inserted in the casing the strips c c at its vertical edges will enter the groovesff and will be at once bent crosswise, as shown, the deflected portion of each strip being accommodated by the wider portions of the grooves, while the edges of the strips are closely pressed by the elasticity of the material of the strips against the seats 2 2 at the bottoms ofthe grooves. Thejoints between the edges of the sash and the casing are thus tightly closed and the window is prevented from rattling. The friction of the strips on the grooves is sufficient in some cases to support the sash in a raised position. The edges of the strips are guidedby the seat 2 and the sides of' the grooves, so that said edges cannot be displaced laterally.

The groove f in the window` ledge or sill is preferably formed like the grooves in the sides of the casing, and the strip c', which enters said groove when the window is closed, is preferably wider than the depth of said groove, so that when the sash is closed said strip is slightly bent.

The strips may be of rubber, as already stated; or, if preferred, they may be made of metal sufficiently thin to have the required flexibility, in which case the bottom of the groove may be protected against wear by a lining, 3, of metal, as shown in Fig. 5.

I am aware that it is not new to apply a flexible strip to a window-sash, said strip being disposed in a groove in the parting-head between the upper and lowersash; but, so far as I am aware, a groove of the form herein shown and claimed has not been provided in the casing to receive and guide a strip projecting from the edge of a sash.

A window-sash having fiexible strips c projecting from its edges, combined with a cas- IOO ing having grooves of less depth than the In testimony whereof I have signed my naine width of the projecting portions of the strips to this speeifieation,in the presence of two suband provided with narrow bottoms or seats 2 scribing witnesses, this 24th day of April, A. 0f the same width :ts the outer edges of the D. 1888.

5 strips, and with inelinedsides which converge from the outer ends or mouths of the grooves WILLIAM H. DAYVSON. to the seats 2, said sides guiding the outer edges of the strips c to the seats 2 and keep Witnesses:

ing said edges in Close Contact with said seats, C. F. BROWN,

1o as set fort-h. A. D. HARRISON. 

